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BEST AVAfLABLE COP May 18 1926. 1,585,517

E. B. THURSTON SWITCH MECHANISM Filed July 13 1921 3 Sheets-Sheet l fifimw BEST AVAlLABLE COP May 18 1926.

E. B. THURSTON SWITCH MECHANISM Filed July 13. 1921 3 SheetsSheet 2 BESTAVAiLABLE COP May 18 1926. r

E. B. THURSTON SWITCH MECHANISM Filed July 13. 1921 3 Sheets-Sheet 5Patented May 18, 1926. T -ABLE COP. 1,535,517

UNITED STATES PATENT OFFICE.

ERNEST B THURSTON, OF TOLEDO, OHIO, ASSIGNOR TO THE HAUGHTON ELEVATOR &IlIACHINE 00., OF TOLEDO, OHIO, A CORPORATION OF OHIO.

SWITCH MECHANISM.

zpplication filed July 13, 1921. Serial No. 484,429.

This invention relates to electromagnetic motor operated switches.

This invention has especial utility when incorporated in connection withpolyphase electric current torque or high internal resistance switchoperating motors for elevator service.

Referring to the drawings:

Fig. 1 is a wiring diagram wherein the alternating current is threephase three wire, incorporated for elevator service, with the controlleron the elevator car, disclosing an embodiment of the invention; I

Fig. 2 is a front elevation of the switch board for the wiringinstallation of Fig. 1';

Fig. 3 is a detail View of a flexible coupling; J j p p 7 Fig. 4 is across section of the accelerator switch cam shaft showing the generalrelation of the three cams thereon; v

Fig. 5 is a detail viewofthe stop carrying bracket for the weights;- ci. V

.Fig. 6 is a side elevation of the main motor switch cam, contactcarrying arm, and cam engaging means; p

Fig. 7 is a section ofthe direction switch rock shaft with arm forpicking up the weights; and I Fig. 8 is a View of the direction switchactuating cams.

In the elevator shaft 1 having landings 2 is operable elevator car 3carried by hoistline 4: passing about drum 5 over idler 6 tocounterweight 7. Alternating'electriccurrent supply is shown which maybe sixty cycle, three phase, by way of supply lines 8, 9, 10. From theline 8 branch line ll extends past upper overtravel switch 12, thence byline 13 past lower overtravel switch 14., thence by line 15 pastemergency switch 16 in the car 3, thence by line .17 past lower final orstopping switch 18 by way of line 19 to contact 20 on arm of controller21 in the cal-'3. This contact 20 on the controller 21 when in offposition connects across to line 21 past upper final or stopping switch22 thence b line 23 to connect with the line 17 The emergency switch 16is accordingly in the lines for both overtravel limit switches as to thesupply from the line 8. From the supply line 10 is branch line 24 pastupper over-travel switch 12, thence by way of line 25 past the lowerovertravel switch 14, thence by line 26 past the lower or final orstopping switch 18, and thence-by way of line.

27 to controller carried bottom contact 28 on the controller 21. Shouldthis lower final or stopping switch 18 be open, there is branch line 29from the line 26 by way of the upper stopping switch 22 extending fromthence by line 30 to the lower contact 28 of the controller 21.Accordingly, in shifting the controller 21 to the left, the contact 20is moved away from the line 21 and the contact 28 is moved away from theline 30. This automatically cuts out the upper final switch 22.as to thecontroller 21, for this shifting of the controller to the left'iseffective for operating the car 3 for downward travel, Reverse shiftingfor car travel upward cuts out the switch'18'.

The contact 20 is in this movement brought to connect'the line 19 withline 32 extending to line Simultaneously with this'shifting of thecontact 20 of the controller 21, the contact 28 of the controller'2lconnects the line 27 with line 34. These lines 33, 34, ex-

tend to main switch operating'motor 35, the

third line,tothi'smotor"bei1 ig connected by way of line-36 to line37,contact 38 on the accelerating switch, and thence byline 39 to line40 connecting with the supply line 9. This main switch motor has shaft41 pro"- videdwith flexible connection 42 to'rock shaft 43' carrying cam44' efiective for throwing switch contacts '45, 46," of the main switchjFurther shifting of this controller 21 in thecar3 to the left brings thecontact 20- to line 47 extending to line 48', while simultaneously thecontact 28 is swung to line 50. These lines 48, 50, extend to directionswitch operating motor 51 having a third line 52 therefrom connectedwith the line from the supply line 9. j This energizing of directionswitch torque motor 51 operates its motor'shaft 53 having flexiblecoupling 54 with rock shaft'55'carrying direction switch operating cams56, 57. The cam 56 for down direction travel of the car 3 throwscontacts 58, 59. The contact 59 is effective by way of line 60 from thesupply line 10 by the main motor switch contact 46 to line 61.Simultaneously the sup} ply line 8 is connected by contact 58 with line62. The throw of the main switch contact IB-connects supply True? 9]withline .63. These lines 61,62, 63, extend to'thr'ee pham slip ringmain elevator motor 64. From the line fi2 eXtends-the linefif)togcoil-fifl thenee by line 67 to line. 133-. Accordingly-simultaneouslywithfthe energizing of the field coil from the lines 61, 62, 63, of thisinotor l, coil 66 releases bral-ze 68 so that this motor 04: may operateshaft 69, and through worm speed reduction gearing 70 rotate the drum ina direction to lower the car 3 in the Shaftl.

The line 61 has branch 71; the line 62, branch 72, extendingto'accelerator switch motor 73 having a third line '74 therefromconnected to line 63. 'The accelerator switch torque motor 73 is onshaft 75 having pinion 7 6 in mesh wi'fligear-Tr for twoto one'speedreduction driving of camshattfifi carrying cams 1'79, 80, 81. The'travel 'of. this .cain shaft 78 is resisted. This resistance is hereinshownto embody a disk 82. having flexible connection 83 with piston 8.in cylinder 85 as a .dash pot device, the "le'aklageof "which may beadjusted. by yalveSS. Accordingly, the main. switch operatin torqiiemotor 35 is first effective,- land ftheponti'olie'r 121' shifted to thesecond position, the "direction switch torque motorfril-'beconiesifiective. 'Simultaneouslyjwith the operationof thisdirection. switchmotor '51, i accelerating switch motor'73 i actuated.As the shaft 75, retarded by 'the' dash'pot dsviee' 82, 83, B 1, 85, 86,starts operation there 'ifsathrowingiot contact 87 for cutting ontgtliefirst portion of starting resistance-.88 in the main motor 6 1. At thedetermined perio'dlof there'- after in the operationfo'f thej'shaft 78,coritact 89 cuts out an additional portion hfthe resistance 88 and thisis foll ow'ed' contact .90 cutting out the balance of. the resistance 88as the motor 16t thus comes to speed. I"

The movement o'fthe' contact. 87 I carries with it the contact '38,thereby opening the line initially effective for completing thepluralityof phases "for operating the main switch motor 35. However,inasmuchas the mainswi'tch is thrown, the-mama d5 carries with'itc'ontactlj91maintaining closed the circuit .betwe'e'ni lines '37, e0, sothat the action of theaccelerating "switch-does not eiiect an opening ofthe mainswitch." The main motor 61 may accordingly stopped by cuttingout thedirection switclrshort of coming to neutral position to out outthe direction motor 51 and "the main switch will still be held in.However, 'anyother action of the controller, or action as to the lineswhich cuts out the main switch at once brings about a full stopping'ofthe main motor 64. and there may not be a restarting of this main motor64; until after the accelerating'switch has come to starting position.

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For upward direction of travel, the controller 21 is shifted to theright for direction switch contact 20 engaging with line 33, mummieswith line 92, the latter extending to line 34. Further shifting of thiscontroller 2l i'or eliecting upwa rd direction travelbringsthe contact.20 to line -19 and the contact 28't0 the line l8, reversing the throwoperation of the motor 51.

The embodiment of the devices of this disclosure -2t'or electromagneticor torque motor control for all of the switches is herein developedfor-a main assembly control board embodiment in the remote control ofthe switches from the elevator car. Control board-93, Fig. 2, is shownas having contact arm carrying shaft 9% mounted in bracket 95. Mountedon this shaft 91 are contact arms 96 normally yieldably directed towardthe contacts 45, 46, by springs '97. The shaft 41 has-arm's 98 staggeredwith arms 99 on shaft 213 to carry therebetween the 'llGXIDle diskcoupling 42. Mounted on this shaft 43 isthe cam 44. The actuatingregions for each direction of oscillation or rocking of the shaft "43have uniform accelerating portiOIi lOOOfFthe cam 4-1, one for eachdirection',"each terminating in a less rapid accei crating portion 101.These portions 100 of the dam"4"a' j roX-iinate about 5 inwardiiirctioii' from'tne'tangcntbit contact or" the roller 102 tobe' 'actuated by this cam Thisroller'102'is carried by arm 103 fast with theshaft 9&1 effective for simultaneous throwing of arms'96-on the shaft9%. This arm 103 has extension 101 (Fig. 6) which in position of restfor thecani .1% is adjacent projectibn105 of the 'cam 14. The cam 11 isaccordingly effective 'for holding the arms 96 outward so thatcontacts-15, 46,- are maintained open until the cam-Le is rocked.

In rocking theshaft 13, counterclockwise from tli e posit-i'onshown-in'Fig. 6, the roller 102*ridesupward approximately 55 upon theslow-up portion 101 'e'i'lectin-g a throwing in ofthe arms 96 'rapidlyat first and then more slowly later on. As this throw is being effectedbythe travel of the arm 103, the projectionlM'moves into recess 1106 ofthe cam/14? Should the operation of the torque motor 35 be intheopposite direction, similar fthrow of the arms'96 is efi'ect-ed with theprojection 10 1 riding int-o recess 10? of the 'cam 'Driven 'bythe motorshaft 41 or the torque motor 35 isarm 10S integralfivith coupling arm'99carrying offset 109. The driven shaft {13 adjacent-the coupling =12. ismounted in bracket having bearing 111 (Fig. 5) for {theshaftQ andbearing 112 for the shaft 13. This bracket 110 also carries below thebearing 112 an abutment or stop 113. Loosely mounted upon the projectingportion of this shaft 13 towards the coupling 42 are weights 111, 115,designed as rights and 1,585,617 T AVAILABLE COP lefts. Each weight hasa depending sound deadening felt pad 116 in a depending ear thereof. Theweight 115 has a projection 117 for impacting with felt pad 118 in arecess in the opposing weight 11 1.

As the torque motor 35 is energized the arm 108, say in clockwiserotation from the motor moves to engage the pad 116 of the weight 114infthe commencement. of rotation, throwing such weight 114. so that thefelt seat 118 seats against the projection 117. The extent of rocking ofthe shaft 13 is limited by this weight 115 being held by the stop 113.This throw is adjusted to approximate in either direction. The load ofthe weight upon the shaft 43 is greater at starting and diminishes asthe center of gravity is brought over theshaft 43. Accordingly, thisresisting means of the weight 115 or 111 grows less, while theresistance of the springs 97 at the-arms 96 may remain approximatelyconstant, but are not effective until there is contact and movementthereafter.

'At' once the motor 35 is deenergized the springs 97 tend to throw thearms 96 clear of the contacts 45, 16. This recovery is assisted by the'weights 11501; 114:, rocking the shaft section 11, now notinfluenced byelectromagnetic energy, backto its starting position as detemiinedby-theweights 114, 115, bringing the arm 108, 109, into registry with andclear of the stop 113- which stop receiv'es the concussion-impaet.-

The direction switch motor shaftsection 53 is connected to cam shaftsection 55 in a similar waya's to coupling and weights with armas theshaftseetion 41 is connected to the cam shaft section 43 at themain-switch motor 35. -The cams 56, 57, each have the uniformaccelerating region-100 (Fig. 8) approximating about -5 away from thetangent for the rollers 102 and terminate in less active portions 101.As to these portions for action the cams 56, 57, are rights and lefts.However," the stop portions to be engaged by the arm 104: are somewhatdifferently disposed. The cam 56 has stop port-ion'119extending in thesame semi-circular region as its active cam portion, while the cam 57has its stop engaging portion 120 extending in the same semi-circularregion as the active portion of this cam 57.

\Vhile in the operation of this device a one-direction throw cam similarto 56 or 57 might be used in connection with the main switch motor 35,such would thereby prove a phase reversal-stop device for the apparatus,precluding any throwing in of the switch motor 35 upon the reversal ofphases. However, with the two-direction throw cam adapted to this mainmotor 35, there is an automatic provision caring for phase reversal inthat should supply lines 8, 9, 10, as installed have the phases foroperating .On the reversal of phase this motor 35 would operatecounterclockwise and likewise on the same condition for starting stillthrowing the controller 21 would operatethe direction switch motor 51counterclockwise, thereby throwing contacts 58, 59. This means that theindication atthe controller 21 in the car is good for the phase reversalbecause the reversal in the lines and one motor means a double reversal,thereby nentralizing the efi'ect for car travel direction indication ofthe controller 21. It is true that with this reversal, contacts 58, 59,now mean upward travel as against former meaning of downward travel. nisis a feature of automatic safety incorporated in this ap paratus due tothe motor operation of the switches, the motors 30, 51, being polyphaseand of the torque type. Furthermore, these motors 35, 51, at once thereis a failure on any phase, lose their torque and the springs 97 are atonce efimtive in conjunction with the weightslM, 115, in bringing themotors and likewise the switch contacts into open or initial positions.Accordingly these motors 35, '51, 73, because carrying energizingcurrent when in thrown position, have this safety featurenotwithstanding there is a-phase line. through each of the motors whenbut one phase is disturbed. In rendering possible this control ofpolyphase switch control devices remotely from the controller 21 in thecar, the controller 21 in the car is connected to more than one phase ofthe supply lines.

The-automatic operation for self centering in 011 position is also trueas to the accelerating motor 73 so pulled by the weight 84 dash-potpiston. The three switch controlling polyphase motors 35, 51, 73, mayautomatically return to off position. This return by these motors to offposition may be on failure of one of the phases of the supply. Suchreturn occurs from a non sealing position. As the accelerator motor cams79, 80, 81, are bilateral, phase reversing motor 73 does not disturb thenet result of the accelerating switch control. Each of these switchoperating motors is dissociated from the power motor line as controlledby its switches. These motors are in addition to the power motor of thetranslation circuit. Furthermore, there is, due to this energizingaction of the rotating field in the torque motor, constant pull actionby the motor itself so long as the energizing current is therein.

There is symmetry as to the actuators 35, 51, 73. There is symmetry asto the arms 96. vAccordingly there is possible interchange of arms andauxiliary motors, one of each capable for replacement anywhere on theboard.

The design of the cams has developed a proper timing for quiet and quickcontrol operation by the remote controlherem disclosed. I

The extensionsJOl of the arms 1-03 not only coact 1 againstfth-rowinginof one switch arm before the cam is in position to hold such arm outbut such extensions lO-i are effective on rotation of the cam back tooff position for positively withdrawing the switch arm from contact orthrowingin position. Accordingly in any quick reversal of operation ofthe torque motor, there is aninsured positive pulling out of the switcharm. The throw of the arms 96 as to the travel of such arms largelyoccurs as the rollers 102 ride along the canrregions 100. The slowing upofthe travel of: the roller 102 by riding upon the cam portion 101 notonly :quiets the tinal closing in action of the arm 96 atltheiengagingposition of the contact in the-quick throwing. in switches,but this slowing: up of travel of the cam allows the motor-to -moreieadily compress the spring 97; as the period of motortravel or.dri-vixngw is beyond the throwing in of the switch:tlhereiszaccordingly a compressing-of the springewnfor holding thecontact: =ofrlthe zswitch'iaga'inst vibration. This compression-of thespring operates as a safetywdevicei'inekiclcing:ozff for throwin the arm.awaydrom switch closingpos'itlon and :is of3 such effectiveness thateven Without :the weights L114" 115; the arms may be released. i 3

\Vhat isclaimed and; ;it i is desired-: to secure by Letters Patentis: in

1. A switch for v power :iappar-atus,' 'said switch being providedavith'immoviable arm, a cam for shifting thearm,='a springyield ablyco'acting between the ca n andtlie arm, and, independent :of said powerapparatus,- a switch motor for actuating'i the Learn, there being means,in addition to thesprin'g, for decreasing theload on the motor as thecam in its travel brings the arm toward fully thrown position to stallthe motorwith current still energizing-said motor; i a

2. A s'witchprovided'with a movable arm and a camfor' shiftingthearm-embodying a. uniform accelerating portion, a slowing up portion, anda-stop portion'as the cam in its travel brings the arni' toward fullythrown position. f 'i 3. A switch provided with a movable arm and a.rotary cam for shifting the arm embodying a first actuating portion ofless than tangent from the starting point radial increase, a secondslowing up portiomand a stop portion as the cam in its travel brings thearm to fully thrown position.

4. A pair of switches forthet/ranslation circuit of a power motorapparatus, said switches each having a movable arm, an actuating shaft,a switch motor in a control circuit complete in itself independently ofsaid translation circuit, said motor being for actuating saidswitchesfrom said shaft, and a cam for each switch mounted on said shaft, eachcam provided with an arm shifting portion and an arm holding portionoppositely disposed, whereby the shaft in rotation in one directionthrows one switch in and holds the other out and in rotation in theopposite directionholds the one switch out and throws the other in.

5. A sectional switch operating shaft embodying a. driving sectionhaving an actuating arm operable in either direction of rotation, aswitch motor for actuating said driving section and a driven sectionhaving maintained transmission connection with said driving section andhaving one 'eightod arm to be engaged and then lifted in one directionof driving section rotation, and another weighted arm to be engaged andthen lifted in the other direction of driving section rotation, a pairof switches 11 ving parallel arms, and means on the shaft driven sectionfor throwing the arms 'of one switchin one direction of rotation and forthrowing the arms vof the other switchin the -other direction ofrotation.

I 6. -A; switch-operating sectional shaft embodying a driving sectionhaving an actuating arm effectivejin either direction of rotation; froma position of rest, a switch anotorlyforactuating said driving section,a driven shaft section aligned with the drivdug section; and having.maintained transmission-connection with-,said driving sectifonwand:havin'g a ypair of ,weighted arms loosely mounted-on; saiddriven-section, a

bracket :for -theidriven shaft section provid-'ingian:abutmentZ-adjacent: the position of rest oftsaid; actuating arm,said weighted airinsrnonmallyresting against the abutment clear 'ofsaidaactuating. arm, said driving shaft -as movable in one directionshiftable freely then to abut one of said arms to lift suchrarm in onedirectionof-driving shaft travel :and (to move and then'lift the otherarm invthe other direction of driving shaft travel. V

7 A rock shaft having a driving section, a driven section alignedwithsaiddriving section,1a flexible maintained transmission connectiontherebetween, a bracket for the driven section. providing a stop, an armfixed with the driving section and registering with said stop, andspaced weights on the driven section normally hanging against the stop,said arm effective in one direction of rotation to move into'contactwith and then lift 50136 of said weights against the other weight insuch one direction of rotation to have such direction of shaft rotationIll) stopped by the latter weight being held by the stop, and said armeifective in the opposite direction of rotation to move into contactwith and then lift the other of said weights to bring it against the oneweight to have such latter direction of shaft rotation stopped, by theone weight held by the sto 8 A switch for power apparatus, said switchbeing provided with a movable arm having a first contact, a secondcontact to be engaged by the arm contact, a cam for shifting the arm,independent of said power apparatusa switch motor for actuating the cam,and a spring coacting for follow-up action after said contacts are inabutting relation, there being means in addition to the spring fordecreasing the load on the motor as the cam in its travel brings the armtoward fully thrown position to stall the motor with current stillenergizing said motor.

9. Power actuation means for a switch including a rock shaft drivingsection, a maintained transmission driven section therefor, a momentumstoring weight loosely rockably mounted on the shaft driven section,engaging means for angularly shifting the weight on shaft actuation, andsound deadening stop means for the weight.

10. A switch for power motor apparatus, a switch motor dissociated fromthe line controlled by the switch, said motor being.

for actuating the switch for a period of travel beyond the throwing inof the switch, and intermediate transmission change speed means betweenthe switch motor and switch slowing up action at the switch in the finalswitch closing for quieting switch operation.

11. A switch for power motor apparatus, a switch motor independent ofsaid apparatus for actuating the switch for a period of travel beyondthe throwing in of the switch and to a stalled stop position for theswitch motor with current still energiz ing said motor, and intermediatetransmission change speed means between the switch motor and switchincluding a cam slowing up action at the switch in the final switchclosing for quieting switch operation.

12. A switch for power motor apparatus, a switch motor independent ofsaid apparatus for actuating the switch for a period of travel beyondthe throwing in of the switch and to a stalled stop position for the,517 BEST AVAILABLE COP:

switch motor with current still energizing said motor,intermediate;transmission change speed means between the motor andswitch including a cam slowing up action at the switch in the finalswitch closing for quieting switch operation, and a spring opposingmotor driving during slowing up action of the cam.

13. A switch for power motor apparatus, a switch motor independent ofsaid apparatus for actuating the switch for a period of travel beyondthe throwing in of the switch and to a stalled stop position for theswitch motor with current still energizing said motor, a member directlyconnected and positively driven by the motor, and an arm for throwingthe switch, said member being movable relatively to the arm and havingmeans coacting to move the arm positively into and out of switch closingposition.

14. A switch for power motor apparatus, a switch motor independently ofsaid apparatus, a member positively driven by the motor, a two-part armas to which the member is relatively movable, each part having a guide,a shaft providing a common axis for said two-part arms, an adjustableboltthrough said guide, and a compression spring on said bolt forabutting one arm and through the bolt effective for holding the otherarm toward said member, said two-part arm being operable for throwingthe switch as actuated by the member.

15. A switch for power motor apparatus, a switch motor dissociated fromthe line controlled by the switch, said motor being for actuating theswitch for a period of travel beyond the throwing in of the switch, andintermediate transmission change speed means between the switch motorand switch slowing up action at the switch in the filial switch closingfor quieting switch operation, said transmission means being providedwith a movable lock out for the switch in opened position for the switchas determined by said means.

16. A switch having a movable arm, a motor having a shaft for shiftingsaid arm to switch closing position, and means precluding operating saidarm to switch closing position independently of operating said shaft.

In witness whereof I afiix my signature.

ERNEST B. THURSTON.

